Mining machinery.



A. H. GIBSON.

MINING MACHINERY APPLIGATION FILED NOV. 15. 1905.

Patented Mar. 23, 1909.

3 SHEETS-SHEET 1.

A. H. GIBSON.

MINING MACHINERY.

APPLICATION FILED NOV.15,1905

Patented Mar. 23, 1909.

3 SHEETS-SHEET B.

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m'rrsyes: ti d Mud/4 A. H. GIBSON.

MINING MACHINERY.

APPLICATION FILED NOV.15, 1905.

Patented Mar. 23, 1909.

3 SHEETS-SHEET 3.

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mesa-5 a M. J I

UN .l TE] )v STATES PATENT oinnon.

\Rlllt R I tilllh'tlx. til EAS'LON, PENNSYLVANIA, ASSIGNOH 'lO Ih'tilfiRSULL-RANI) L'UMPANY. OF NEW YORK, N. Y., A RI'OR-ATION 01* NEW JERSEY.

MINING MA GHINERY.

Specification of Letters Patent.

Patented March 23, 1909.

Application filed November 16, 1905. Serial No. 287,400.

'/o u/t tU/tOm it may (voter/1i:

Be it known that l, An'nma ll. Ginsox, o sulijtCt. of the King of Great Britain, and resident of 'Easton, in the county of Northinnpton and State of Penns lVania, have inrented a new and useful improvement in Mining Machinery, of which the following is a specification.

My invention relates to inqnovements in to mining machinery and is devoted more particularly to certain improvements in the construction, form and arrangement of the several parts of an air pressor for use. in connection with :1 coal cutting machine whereby i the operation and control of the machine is facilitated.

\l y invention contemplates the following improvements. (1). The provision. of an air passage of one capacity connecting, the

A-o ressor and work cylinders for producing the lorward stroke of the work cylinder piston and an iiir passage of a smaller capacity eonnecting the two cylinders for noducing the return stroke of the work cylinder piston.

-.. (:2). Means for restricting the suction inlet of the compressor pump when-Irv the required. amount of air chili is admitted to the pump to make up for eakage in the. ap-

Lion with the pump itself whereby thepump relieved hen the pressure reaches a pro represents a portion of a. coal cutting innchine in side elevation and on eleetrieallr driven air pressor for driving the same, the ilexiblc tuhcs between. the pressor and work .i cylinders being broken away. Fig. 1 represents the work cylinder in longitudinal central section with. the work cylinder piston and its rod shown tl'ierein. Fig. 1* is a detail section showing the inletpi' and cock thercno for. Fig. 2 is a horizontal section through the pressor, the electric motor for driving the same being shown in top plan. Fig. 3 is a vertical central section through. the pressor. Fig. 4 is an end view of the prossor, on the electric motor being shown in side. BlPVlh paratus. (3). The provision ofa relief val'ye or the prcssor pump in direct eommunreai tion. l ig. 5 is a detail sectional view of the relief valve for the. pressor pump, and Fig. 6 is another detail section through the inlet and discharge valves of the pressor pump.

The work cylinder ot'the portable coal cutting machine is denoted by 1, to the front and rear ends of which are attached flexible tubes 2 and 3, leading to the. front and backof the work piston 1*. The forwardly extending rod of the work piston which works through the end of the cylinder is denoted by 1**.

An electrically driven air pressor is shown as mounted on the bed plate 4 carried by a wheeled truck 5. The trout and rear ends oi the air pressor cylinder 6 are connected to the flexible tubes B'i-ind 2 respectively. The front head 7 of the pressor cylinder is extended to form a pump cylinder 8 and the rear head 9 of the pressor cylinder is provided 75. with a tubular extension 10 which forms a part of a closed crank casing I 1 within which a crank shaft 12 is mounted. 'lhis crank shaft I2 is driven iron a suitahle electric motor 13, mounted on to bed plate 4, the. connection in the present instance being shown as a spur gear 14 fixed to the crank shaft 12 and a pinion 15 fixed to the electric motorshalt.

'lhe prossor piston is denoted by 16 and it is provided with a rear hollow extension 17 which forms a piston trunk, which trunk is titted to slide in the tubular extension 10' hcreinhel'ore referred t-o. A pitman rod 18 connects the piston 16 with the, crank shaft 12, whereby a reciprocatingmovement is imparted to the piston from the said crank shalt.

A forward extension 10 of the pressor pisi ton to forms the trunk'olithe nrmp and it is titted to slide in the pump ey indcr 8 The diameter of the piston truukjis greater than the dian'iotcr oi'the trunk of the pump so that. there is a greater volume. of air admitted to and driven from the space in front of the piston than from the space-in back of the nstotr 'lhe [lcxihlo tube 2 which leads from the space bark of the. pressor piston to the forward end of the work cylinder is smaller in capacity than the iloxiblc tube 3 which leads l'ro'm the. sp-tro in front of the press-or piston to the rear end oi the work cylinder. The reason for thus making the air passage through lhe tube sundler than. the air pasas e tlii'ougfiathe t-ulw .l is tho! the work cyladjusting smaller capacity in front of the work piston 1* than behind by reason of the large front 5 piston rod 1* which is essential for the nttachment of the cutting tool. If llw inner side of the air pressor piston wos nuulo of greater capacity than t 1e [rout side of the work cylinder piston there would he not only I a waste of energy but-it would also newsmtate the use of a larger air passage between these points than would be rm nil-rd to get a maximum ell'ect.- It would also fl-(ld a. certain amount of extra. and useless work to be done llt each end of the pressor stroke by moving an extra amount of air into and out ofthe air passage. Therefore, the piston think is madelarger than the trunk of the {pump for insuring a smaller capacity back of so he 'ressor-pistoxi and. theflexible tube 2 is me 0 small enough to obtain the roper efffejchoii the front of memo; cylin er piston to ins'iire its pager, rep-word movement.

head athe pum cylinder l'orms a.

rfilliijnmg for the inlot and dischargevelves 21,

A port 23 has from the t pf the in-- lit-v de r nlidn rt nlve intothe pump cy I 'li'learls fromitlre pumpcyl or to'tlie ttom of z-lao discharg'e lralidggrj pipe 25 leads from the extgmol atmobphe'ro jtothe bottom of the ilfletjmlve 2 1,jirwhioh ipe I provide a cock ummy dammim amountof air which them- 3 pump oy inner." Thi-regaon' fo :he Simona: ofgl' mhm moy through the inlet. :25 1s thutfvi-hm the ri'or oi thelpumpocvl s This mire-is yieltlixiglyhld v I so Vb means of -11 w r n-h momm on; rforgted-oo'p g3 .rhfr in ll-mgr": 1118.11,

which -tool r0 1-; Tho uired' amount of air 'ng may-6521 tolthereq aorough: astthe inlet (valve i 'el ef. *vi lye for',-t h}pujmp \i 'sem mu-soap one. 1 one ous-min e. finerm oi rx tonhnv' f itetod 1;; T E-2 28 0|. hispip'e' "nor cylinder in so arranged that he est-ablisliml from thothis spring 31, the prosuuro 0.\'-

; ortml on the valve 29 may be so rugulatoil that the valve will open when the air pressure within the pump cylinder reaches u re- (letermined point, thus releasing the 0nd from the pump before the pressure reaches at higher degree than that required for supply ing air under the pro nor pressure to lheom' or the other side oi the prosnor piston.

From the above description it. ill be soon that oll unneccssory loads orv lulnuvcd from the air pressor, thus permitting the some to economically do the work required. Furthermore, unnecessary wear of tho parts is obviated,

In operation; the cool muvhimnml rho truck carryiizfi the pressor and its motor, are readily inov togfit'her to the nint nhore 0 stations are to e begun. 'l c cool meo e is then placed in position and because of the flexible tube commotion between the coal machine cylinder and the pressor cylinder; the coal machine may be fed to its work without disturbing the pressor truck. When the ports are in 'position, the motor isstarted, thereb I starting the operation of the ressor. the pressor piston reciprocates, 1 will reciprocate the columns of air through the tubes. and thus cause the reciprocation of the coalmechine piston andthemby the pump for-raising the air to-the desired point 'in' the torn and. the PEW 1 duly loodn gthe pump for tho 'efiioient "oer a v 1o WhfleUnited StnteslLettera Patent ,No. 1 1 g t fme Jenner-3 11x1907; ho s; p a-tor m s nei wwuse th y m. n -renown: u er-m fl e fl om g e'th nm unt' .10.

wirt kwtl thel et wov f he o "12.... as hy'imenfian-isi d of 1,1

trunk of the pump, a flexible nir tillle eonnesting the rear end of the Work cylinder \i ith the front end of the pressor cylinder and a. second smaller air tube connecting the front end of the work cylinder ith the rear end of the pressor cylinder.

3. A pressor cylinder, air passages lending therefrom, a pressor piston. a pump, its inlet.

and disi-luirge valves. a passage lending from the disehnrg e valve to ranged to be alternately opened to the opposite sides of the pressor piston and means for regulating the mnount of air drnu the inlet valve of the pump.

4. A pressor cylinder, nir passages lending tllLllFlfilll. :i pressor piston, a. pump, its inlet and discharge valves, a. passage lendii'ig from the discharge valve to the i'ylinder arranged to he ailternntrdy opened to the opposite. sides of the pressor pipe for the inlet valve rind n cock in snid pipe for zirrurnt ly of nir nhirh inny he Illfl, n through the inlet; VulYt into th pump.

5. A pressor Cylinder, nil passages lending therefrom, a press-0| piston, :1. pump, its inlet. :LIltl discharge valves, n. pnssn 'e. leading from. the disehnrge valve to the e r to he iilternntely opened to the opposite sides of the. pressor piston and a. valve for auto- 11 through i and diwhnrge valves. a mssn 'e leading from the di hnrw valvito ti to he .ii ernntely opened determining th amount.

nnrtiez-rlly relieving the the cylinder and iii'- pressure in the pump hen it renches a predetermined point.

6. A prcssor cylinder, air passages lending therefrom, a pressor piston, a pump, its inlet and discharge valves, a assa e leading from the discharge valve to t e oy inder arranged to he alternately opened to the opposite sides of the pressor listen, a valve for autoninth-ally relieving the pressure in the pump \.lllll it rel-relies n predetermined point and menus for ndjusting the said valve.

pist n, an air admission inder arranged safety valve opening passages lending 7. A prvssor cylinder,

a pump, its inlet therefrom, a pressor piston,

to the opposite sides of he pressin' piston, and n relief or to the top of the inlet wire it hereby it is at nil times in 0 en commnniezition ith the interior of tie pump for relieving pressure therein u hen it reaehes :1, predeterminvd point.

In testimony. that l (-luiin the foregoing I as my invention. 1 have signed my name in pwsi-nve ot' tno v ilHPSQOSpllIlS 13th day of November I905.

ARTHUR H. GIBSON. Witnesses:

Fnnux. HAYNES, HENRY Tninmz.

(y inder arranged ill 

